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HDFS-2797. Fix misuses of InputStream#skip in the edit log code. Contributed by Colin Patrick McCabe 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1348945 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Eli Collins 2012-06-11 18:01:38 +00:00
parent 27d1c74a0c
commit 56d2ef6f5e
6 changed files with 48 additions and 5 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -308,6 +308,9 @@ Branch-2 ( Unreleased changes )
HDFS-3490. DatanodeWebHdfsMethods throws NullPointerException if
NamenodeRpcAddressParam is not set. (szetszwo)
HDFS-2797. Fix misuses of InputStream#skip in the edit log code.
(Colin Patrick McCabe via eli)
BREAKDOWN OF HDFS-3042 SUBTASKS
HDFS-2185. HDFS portion of ZK-based FailoverController (todd)

3
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/EditLogFileInputStream.java
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@ -165,7 +165,8 @@ public class EditLogFileInputStream extends EditLogInputStream {
LOG.warn("skipping " + skipAmt + " bytes at the end " +
"of edit log '" + getName() + "': reached txid " + txId +
" out of " + lastTxId);
tracker.skip(skipAmt);
tracker.clearLimit();
IOUtils.skipFully(tracker, skipAmt);
}
}
}

5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogLoader.java
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@ -751,6 +751,11 @@ public class FSEditLogLoader {
limitPos = curPos + limit;
}
@Override
public void clearLimit() {
limitPos = Long.MAX_VALUE;
}
@Override
public void mark(int limit) {
super.mark(limit);

7
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogOp.java
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@ -44,6 +44,7 @@ import org.apache.hadoop.security.token.delegation.DelegationKey;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.DataOutputBuffer;
import org.apache.hadoop.io.ArrayWritable;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableFactories;
@ -2289,9 +2290,11 @@ public abstract class FSEditLogOp {
// 0xff, we want to skip over that region, because there's nothing
// interesting there.
long numSkip = e.getNumAfterTerminator();
if (in.skip(numSkip) < numSkip) {
try {
IOUtils.skipFully(in, numSkip);
} catch (Throwable t) {
FSImage.LOG.error("Failed to skip " + numSkip + " bytes of " +
"garbage after an OP_INVALID. Unexpected early EOF.");
"garbage after an OP_INVALID.", t);
return null;
}
} catch (IOException e) {

5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/StreamLimiter.java
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@ -27,4 +27,9 @@ interface StreamLimiter {
* Set a limit. Calling this function clears any existing limit.
*/
public void setLimit(long limit);
/**
* Disable limit.
*/
public void clearLimit();
}

30
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestEditLogsDuringFailover.java
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@ -20,6 +20,7 @@ package org.apache.hadoop.hdfs.server.namenode.ha;
import static org.junit.Assert.*;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URI;
import java.util.Collections;
@ -35,6 +36,7 @@ import org.apache.hadoop.hdfs.MiniDFSNNTopology;
import org.apache.hadoop.hdfs.server.namenode.FSImageTestUtil;
import org.apache.hadoop.hdfs.server.namenode.NNStorage;
import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.test.GenericTestUtils;
import org.junit.Test;
@ -118,8 +120,8 @@ public class TestEditLogsDuringFailover {
}
}
@Test
public void testFailoverFinalizesAndReadsInProgress() throws Exception {
private void testFailoverFinalizesAndReadsInProgress(
boolean partialTxAtEnd) throws Exception {
Configuration conf = new Configuration();
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
.nnTopology(MiniDFSNNTopology.simpleHATopology())
@ -130,8 +132,21 @@ public class TestEditLogsDuringFailover {
URI sharedUri = cluster.getSharedEditsDir(0, 1);
File sharedDir = new File(sharedUri.getPath(), "current");
FSImageTestUtil.createAbortedLogWithMkdirs(sharedDir, NUM_DIRS_IN_LOG, 1);
assertEditFiles(Collections.singletonList(sharedUri),
NNStorage.getInProgressEditsFileName(1));
if (partialTxAtEnd) {
FileOutputStream outs = null;
try {
File editLogFile =
new File(sharedDir, NNStorage.getInProgressEditsFileName(1));
outs = new FileOutputStream(editLogFile, true);
outs.write(new byte[] { 0x18, 0x00, 0x00, 0x00 } );
LOG.error("editLogFile = " + editLogFile);
} finally {
IOUtils.cleanup(LOG, outs);
}
}
// Transition one of the NNs to active
cluster.transitionToActive(0);
@ -149,7 +164,18 @@ public class TestEditLogsDuringFailover {
} finally {
cluster.shutdown();
}
}
@Test
public void testFailoverFinalizesAndReadsInProgressSimple()
throws Exception {
testFailoverFinalizesAndReadsInProgress(false);
}
@Test
public void testFailoverFinalizesAndReadsInProgressWithPartialTxAtEnd()
throws Exception {
testFailoverFinalizesAndReadsInProgress(true);
}
/**